Subluxation: Partial dislocation of a joint. A complete dislocation is a luxation.
The largest number of items per content database that has been tested on SharePoint Server 2013 is 60 million items, including documents and list items. If you plan to store more than 60 million items in SharePoint Server 2013, you must deploy multiple content databases.
For SharePoint Foundation 2013 the maximum number of index components per Search service application is one, so the maximum number of index replicas per Search service application is limited to one.